inital code for focus item

sparkdebug/focus.lua

@@ -0,0 +1,52 @@
+local NAME = minetest.get_current_modname()
+
+sparktech.tool_focus = {}
+
+function set_view(playername, object)
+	local type = object["type"]
+	local player = minetest.get_player_by_name(playername)
+	if type == "node" then
+		local vecnode = vector.direction(player:getpos(), object["under"])
+		--[[ Do proper rotation of vector and then set the view
+			reference is for both cases the z axis (e.g the planes (1 0 1) and (0 1 1)
+			]]--
+		--minetest.debug("\n" .. yaw .. " " .. pitch .. "\n" .. player:get_look_yaw() .. " " .. player:get_look_pitch() .. "\n" .. dump2(player:get_look_dir()))
+		--player:set_look_horizontal(yaw)
+		--player:set_look_vertical(pitch)]]--
+	else
+		-- either player or object now
+		-- return for object, for a player we can do stuff
+		return
+	end
+end
+
+function on_use(one, player, pointedobject)
+	if pointedobject == nil or player == nil then return end
+	sparktech.tool_focus[player:get_player_name()] = { pointedobject }
+	set_view(player:get_player_name(), pointedobject)
+end
+
+minetest.register_tool(NAME .. ":focus", {
+	description = "focus",
+	inventory_image = "debug.png",
+	stack_max = 1,
+	range = 20,
+	on_use = on_use
+})
+
+minetest.register_globalstep(function(dtime)
+	for k, i in pairs(sparktech.tool_focus) do
+		local player = minetest.get_player_by_name(k)
+		if player == nil then
+			sparktech.tool_focus[k] = nil
+			return
+		end
+		set_view(k,i)
+		return
+	end
+end)
+
+--[[
+	function to get item id
+	for k, v in pairs(core.luaentities) do if v == self then  my_found_entity_id = k; break end
+]]--